As soon as I add a credit the ball launches without having to press the right flipper button. It behaves as it should in that if the ball hit no switches and the ball returns to between the flippers it will not launch again until I press the right flipper button. Once a switch is hit or at the start of a new game once the ball returns between the flipper (drains) it auto launches without having to press the right flipper button. Not so familiar with these novelty pins. Is this normal? I checked the ball return relay switch 2A green-yellow to Black-white switch and it is functioning as it should per schematics. Open until ball drains.

Yes I do have the schematic.

Do not have the manual.

A little more investigation... The Ball Return Coil sends a green-red wire to the Ball Return Relay O on a switch where the other side of the switch connects to a Brown-Red wire. In the schematic it shows this switch open. This switch shows continuity open or closed. I pulled the relay off the rail so I could view it from the side and ensured the switch is opening and closing. But yes I am getting a continuity tone on my meter whether the switch is open or closed.
I suppose there could be a short between these two wires. I hope to get back into it tomorrow. I'll disconnect the Green-Red from the coil. Then use a jumper wire from the coil lug to the Green-Red side of the switch at Relay O.

I did think of that but good point. I've not had the chance to get at it. Should some time this week.
The schematic does show from ball return coil to a switch on the ball return relay which is normally open. The other side of this switch goes out to switch 2c on the motor. Between switch 2C and the ball return relay switch this wire does branch off to the wire coming from the vari target reset relay and a normally open switch at that relay.
I'd like to post a pic of the schematic but being Gottlieb I'm sure it would be yanked in no time.